/*******************************************************************************
 * Copyright 2014 org.tec
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.tec.webapp.json;

import java.util.ArrayList;

/**
 * helper class for serializing list data
 *
 * @param <E> the list data type
 */
public class SerializableList<E extends JSONSerializable> extends ArrayList<E> implements JSONSerializable
{
  /** serial guid */
  private static final long serialVersionUID = 1L;

  /**
   * {@inheritDoc}
   */
  @Override()
  public String toJSON()
  {
    if (size() == 0)
    {
      return "[]";
    }
    else
    {
      StringBuffer buff = new StringBuffer();

      buff.append('[');

      for (JSONSerializable js : this)
      {
        if (buff.length() > 2) //appended more than one list object
        {
          buff.append(',');
        }
        buff.append(js.toJSON());
      }

      buff.append(']');

      return buff.toString();
    }
  }
}
